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How to Calibrate Different Types of Crane Scales?

A white colored crane at a construction site.

A crane scale is a weighing device that is used to measure the weight of a load that is being lifted by a crane. Crane scales are typically used in construction and industrial applications, where it is important to know the weight of a load to ensure safety.

By knowing the weight of a load, crane operators can ensure that the load is not overloaded and that the crane is operating within its safe working limits.

Types of Crane Scales

The two main types of crane scales include mechanical and electronic. Mechanical crane scales use a system of levers and weights to measure the weight of a load. Electronic crane scales use sensors to measure the weight of a load.

There are several different types of mechanical and electronic crane scales available, each with its features and benefits. Here are some of the most common types of crane scales used by commercial operators.

Dynamometer crane scales

Dynamometer crane scales use a mechanism that measures the tension on the crane's lifting cable to determine the weight of the load. They are often used in heavy-duty applications, such as in the construction industry.

When selecting a dynamometer crane scale, the weight capacity should be chosen based on the maximum weight of the load that will be lifted. Overloading a dynamometer crane scale can cause damage to the scale or the crane, as well as create safety hazards for operators and bystanders.

The weight capacity of dynamometer crane scales can vary depending on the specific model and manufacturer. However, in general, dynamometer crane scales are designed to handle heavy loads and have weight capacities that range from a few hundred pounds to several hundred tons.

Smaller dynamometer crane scales may have weight capacities of around 500 to 1,000 pounds, while larger models can handle loads of 100 tons or more.

Hydraulic crane scales

Hydraulic crane scales use a hydraulic pressure sensor to determine the weight of the load. They are often used on telescopic boom cranes where there is a boom lift cylinder.

Hydraulic crane sensors provide accurate load readings and work on almost all telescopic boom cranes.

Single girder crane scales

Single girder crane scales are the most common type of crane scale. They are typically used for lifting and positioning loads that are not too heavy. Single girder crane scales are available in a variety of capacities, and they can be either manual or electronic.

Double girder crane scales

Double girder crane scales are designed to lift and position heavier loads than single girder crane scales. They are typically used in industrial and construction applications. Double girder crane scales are available in a variety of capacities, and they can be either manual or electronic.

Underslung crane scales

Underslung crane scales are designed to lift and position loads that are below the hook of the crane. They are typically used in manufacturing and warehousing applications. Underslung crane scales are available in a variety of capacities, and they can be either manual or electronic.

Overhead crane scales

Overhead crane scales are designed to lift and position loads that are above the hook of the crane. They are typically used in industrial and construction applications. Overhead crane scales are available in a variety of capacities, and they can be either manual or electronic.

Tips for Calibrating Crane Scales

Calibrating crane scales is an important process that ensures accurate weight measurements and helps to maintain the safety of both the equipment and the operators. Here are the general steps for calibrating crane scales:

Choose a known weight: To calibrate a crane scale, you need to have a known weight to compare the scale's readings against. This weight should be within the range of the scale's capacity.

Set up the scale: Place the known weight on the scale and make sure it is secure and level. Turn on the scale and let it stabilize.

Compare readings: Compare the reading on the scale to the known weight. If the scale is accurate, the reading should be the same or very close to the known weight.

Adjust as needed: If the scale is not accurate, you may need to adjust it to ensure it provides accurate readings. This may involve adjusting the calibration setting on the scale or making physical adjustments to the scale's components.

Test again: After making any adjustments, test the scale again with the known weight and compare the readings. Repeat the adjustment process until the scale provides accurate readings.

Document the calibration: Once the scale is calibrated, document the calibration process and the results. This record should include the date, the known weight used for calibration, the scale's reading, and any adjustments made.

Remember that the specific calibration process may vary depending on the type of crane scale being used and the manufacturer's recommendations. Always refer to the manufacturer's instructions for specific calibration procedures and recommendations. Additionally, crane scales may need to be calibrated regularly to ensure ongoing accuracy and safety.

Final Remarks

The type of crane scale that is best for a particular application will depend on factors such as accuracy requirements, weight capacity, and the environment in which it will be used. But you should always select high-quality and reliable crane scales for measuring loads.


crane load indicator


The benefits of using high-quality crane scales such as the i4000 Load Indicator include:

  • Safety: The best crane scales help ensure the safety of workers and others by preventing the overloading of cranes and other lifting equipment.

  • Efficiency: Precise crane scales can help to improve efficiency by providing accurate weight measurements, which can help to reduce the amount of time and material wasted.

  • Compliance: Using high-quality crane scales can also help to ensure compliance with safety regulations by providing accurate weight measurements.

  • Peace of mind: Crane scales can provide peace of mind by giving operators the confidence that they are operating within safe limits. Rated Capacity Indicators (RCI) are an effective safety tool for crane operators and their employers.

Crane Warning Systems Atlanta can help you find the right crane scale system for your needs. We offer a wide range of crane supplies, including crane wind speed, crane RCI indicators, crane anemometers, Load links, and ATB systems.

Call 770-888-8083 or Contact us today to learn more about our products and services.



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